AASHTO LRFD Interface Shear Strength

AASHTO-LRFD Interface Shear Strength for superstructure tutorial is about interface shear force, nominal interface shear resistance and cohesion and friction factors. A horizontal shear force called interface shear develops at the interface between of the girder and the deck under gravity type of loadings. Interface shear force is resisted by cohesion, aggregate interlock and shear friction developed by the force in the reinforcement crossing plane of interface. All reinforcements resisting interface shear force shall be fully developed on both sides of the interface. First nominal shear resistance limit (K1f’cAcv ) is set to prevent crushing or shearing of aggregate along the shear plane. Cohesion and friction factor’s table is given.

AASHTO LRFD Bridge Construction Specifications, 4th Edition

Bridge Design Flow Chart

Start Material Selection Design Basis Construction Stages Preliminary Girder Design Based on Span Length & Width Dead Load Live Load Service Limit Checks Preliminary Tendon Design Prestress Losses Concrete Stress Checks at Construction Concrete Stress Checks at Service Canber and Deflection Strength Flexure Strength Shear Interface Shear Design Deck Design Bridge Modeling